Malicious PDF — malware analysis report

Static analysis result for SHA-256 f703763d82910ea6…

MALICIOUS

PDF

75.4 KB Created: 2021-09-04 20:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c643214c203a167102c91a7735f2b998 SHA-1: 6bf5901a91dc406437b377d1e24066f36f79151b SHA-256: f703763d82910ea68a85e083d17c61aa37fa8c49fdbb9c2904e4428036d7c48f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute phishing content or malware. No scripts were extracted, but the PDF structure itself facilitates redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://miguktour.com/FileData/ckfinder/files/20210703_FA848061251922A0.pdf In PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f49df51346c---goruvisusuvotopubur.pdfIn PDF document text
    • http://budka39.ru/files/58053164920.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/4ebd008fffc0505d7040e30f9e6795d6/lurirabonawujebalokixo.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/91923455908.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/77991619876.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/47862129144.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5cf478cd1---94694399200.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a17ab3e71f39cd2988f8d4da519e16e6/22130405990.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/dadaxakumefedafixobulex.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210728093602.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161041251a849f---99570396441.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607584928c185---32730847506.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/duwatifixexemunabu.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/84665675041.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/webux.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/rarelibuletogowonox.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/6187620614.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/daxinak.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/wevamatodijajigijukufimin.pdfIn PDF document text
    • http://195exim.com/datas/files/derom.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8cabce71---70841898279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=essentials+of+immunohematology+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20D 11040 bytes
SHA-256: 5133022a1d96bb8150b48a20837e8ebc2ff08e62c52e8998e01623d84caf9988
font_01_sfnt_off0000db65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 17168 bytes
SHA-256: ea207119f67d6d1512e17be303b768af0ec6b5ad277254e203412afabfab96ce

Open this report in the interactive analyzer, or submit your own file for analysis.